@pumpdude:
You are partially correct :)
If you have clicked the 'X' in the blue flag to disable the preview, then it won't show under previews only in the Girls Store. I personally click this after watching a demo so I don't keep seeing it. If you have done this for all the cards then there will be ZERO preview cards showing.
Edit: To make the preview cards show again, check ALL in the girls store and then to view them, click on the cards. The Slide out panel will open and you can click on 'Download Preview at the bottom. If you already have it, then this will change to Start Preview and the blue flag will appear again on the card. To disable the card again, click the 'X' in the blue Preview flag :)